PRODUCT NAME: Tadalafil Demethylene Impurity
Date of Mfg: Sample COA	RETEST DATE: Sample COA

Catalogue Number	TAD-006
Item/Batch Number	Sample COA
Quantity	Sample COA
CAS Number	171489-03-5
Mol. Formula	C21H19N3O4
Molecular Wt	377.4 g/mol
IUPAC	(2R,8R)-2-(3,4-dihydroxyphenyl)-6-methyl-3,6,17-triazatetracyclo[8.7.0.03,8.011,16]heptadeca-1(10),11,13,15-tetraene-4,7-dione
Synonyms	Desmethylene Tadalafil; Tadalafil catechol
Long Term Storage Condition	Hygroscopic, -20°C Freezer, Under inert atmosphere
Handling instruction	Sample COA

Test	Results
Appearance	Off-White to Light Pink Solid
Water content by KF/TGA	Sample COA
% Potency = [100 - (Water content by KF)] X HPLC Purity)] / 100	Sample COA
Identification by HNMR	Sample COA
Identification By IR	Sample COA
Mass (ESI)	Sample COA
Solubility	DMSO (Sparingly), Methanol (Slightly)
Purity	NLT 95%
Analysis Date (Release Date)	Sample COA
Attachments	Sample COA
Other Information	Sample COA
Note: This material can be used as a referance standard and is for research purpose ONLY and not for human consumption